Sounds are playing twice

Help and Feedback Scripting Support
#1 
local songs = {
	2147587209,
	371814999,
	213130285,
	2905042651,
	744874281,
	185740716,
	3407360679,
	231717956,
	2014296322,
	2602175217
}
local name = {
	"Dance Pop It Don't Drop It",
	"Super Smash Bros. Melee - Fire Emblem",
	"Super Smash Bros. Melee - Hyrule Temple",
	"Super Smash Bros. Melee - Break the Targets",
	"Mario Kart Wii - Coconut Mall",
	"Super Smash Bros Brawl - Meta Knight's Revenge",
	"Super Mario 3D World - World Bowsers",
	"Super Smash Bros. Brawl - Waluigi Pinball",
	"Super Smash Bros. Brawl - Main Theme",
	"Super Mario Galaxy 2 - Theme of Super Mario Galaxy 2"
}
local SoundService = game:GetService("SoundService")
local sound = Instance.new("Sound")
while true do
	local n = math.random(1,#songs)
	sound.SoundId = "rbxassetid://"..songs[n]
	script.Parent.Text = name[n]
	SoundService:PlayLocalSound(sound)
	sound.Ended:Wait()
	wait(1)
end


I put it on LocalScript. However, sounds are playing mess. What is the problem?

#2

if you use math.random() then songs can play twice because as it says its random